PT8A2651 Datasheet | Pericom Semiconductor

Data Sheet PT8A2651 PIR Sensor Light Switch Controller ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Features - - - - - - - - - Description The PT8A2651 is a CMOS LSI chip designed for automatic PIR lamp control. The chip is equipped with operational amplifiers, a parator, timer, a zero crossing detector, control circuit, a voltage regulator, a system oscillator, and an output timing oscillator. Its PIR sensor detects infrared power variations induced by the motion of a human body and transforms it to a voltage variation. If the PIR output voltage variation conforms to the criteria (refer to the functional description), the lamp is turned on with an adjustable duration. The PT8A2651 offers three operating modes (ON, AUTO, OFF) which can be set through the MODE pin. While the chip is working in the AUTO mode the user can override it and switch to the quickly install mode or manual ON mode or return to the AUTO mode by switching the power switch. The chip is enclosed in a 16 pin SOIC. Operating voltage: 5V (Typical) Average supply current: 120µA (Typical) On-chip regulator Build-in noise rejection circuit 16KHz system oscillator Adjustable output duration Override function ON/AUTO/OFF selectable by MODE pin Auto-reset with ZC signal disappearing over 3 seconds - - - - - Output positive pulses to drive triac CDS to enable/disable output 40 second warm-up Quick check mode for installation Low cost SOIC-16 package Ordering Information Ordering No. PT8A2651W PT8A2651WE Package SOIC-16 Lead free SOIC-16 PT0219(07/05) 1 Ver:0 Data Sheet PT8A2651 PIR Sensor Light Switch Controller |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||...